Surface wave dispersion from small vertical scatterers

Details Surface wave dispersion from small vertical scatterers Surface wave dispersion from small vertical scatterers

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3120602v&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 20, CiteID L20602

Physics

Geophysics

3

Exploration Geophysics: Seismic Methods (3025), Seismology: Earthquake Ground Motions And Engineering, Seismology: Surface Waves And Free Oscillations, Seismology: Theory And Modeling

Scientific paper

Heterogeneity in the subsurface creates conflicting types of dispersion of seismic waves. A laboratory and numerical experiment show that multiple scattering of elastic waves from isolated heterogeneities near the surface not only attenuates, but also delays coherent events. Because scattering off these impedance contrasts is frequency dependent, multiple scattering is a source of dispersion. If ignored, multiple scattering dispersion could be erroneously attributed to a model with horizontal homogeneous layers of different wave speeds.

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